Wistful Wild is the last level that can be accessed in Pikmin 2, once you pay off the Hocotate Frieght Company's debt. This level is a combination of The Impact Site and The Final Trial levels from Pikmin. This level has three caverns and five treasures.
On Days 31, 61, 91, 121, 151, 181, 211, 241, 271, and 301, you may see some weird insects in this place resembling small Doodlebugs. They release poison occasionally and there are a lot of them. Each one has an extremely small amount of health, and each one drops a blob of nectar. They are found in the half-pipe which leads to the Hole of Heroes.